Zoe Saldana 'Can't Stop Crying' From 'Avatar'

"Avatar" cost over $300 million to make, but star Zoe Saldana tells "Extra" the film is much more than incredible computer effects.

"Besides all the technology and the talk about the politics, the political message or about how overly excessive the budget was, it's still an amazing love story," Saldana, 31, tells "Extra" at the world premiere of the film in London.

Saldana says that at the heart of the sci-fi thriller is a classic James Cameron love story. She confessed, "I can't stop crying, the first time I saw it."

She adds, "The moment you sit down and watch it, you will be taken for a ride."